[09:46:33] [Server thread/WARN]: [EpicWorldGenerator] Task #126061 for EpicWorldGenerator v8.1.11 generated an exception
java.lang.ClassCastException: org.bukkit.craftbukkit.v1_15_R1.block.CraftBlockState cannot be cast to org.bukkit.block.Chest
    at com.minelazz.epicworldgenerator.structures.j.run(hda:57) ~[?:?]
    at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.15.1.jar:git-Paper-33]
    at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:452) ~[patched_1.15.1.jar:git-Paper-33]
    at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1179) ~[patched_1.15.1.jar:git-Paper-33]
    at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:417) ~[patched_1.15.1.jar:git-Paper-33]
    at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1106) ~[patched_1.15.1.jar:git-Paper-33]
    at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:933) ~[patched_1.15.1.jar:git-Paper-33]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_232]